It'd be cool to see a 3D version of this that creates objects that you could print on a 3D printer.
I think there's something so memorizing and satisfying with this type of symmetry.
For real though, I had an amazing realization in the shower one time that I could implement 3D rotation without learning linear algebra (or god forbid quaternions) by just doing three 2D rotations. A few hours later I had a rotating monkey!